Enum GroupType

This contains basic categories for Group types. It reflects the categorization
used in old PDB file (e.g. for storing whether a residue is composed of
ATOM or HETATM records. It is less specific than the mmCIF/PDBx-defined
ResidueType enum, which may be more suitable for future applications.

valueOf

Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)